<html>
<head>
<title>环保工程季度数据报表</title>
</head>
<body>
<table wider="550" border="6" align="center">
<caption>环保工程季度数据报表</caption>
<thead style="background:#0af">
<tr>
<th>季度</th>
<th>销量</th>
</tr>
</thead>
<tbody style="background:#6cc">
<tr>
<td>一季度</td>
<td>12</td>
</tr>
<tr>
<td>二季度</td>
<td>11</td>
</tr>
<tr>
<td>三季度</td>
<td>12</td>
</tr>
<tr>
<td>四季度</td>
<td>13</td>
</tr>
</tbody>
<tbody style="background:#ff6">
<tr>
<td>季度平均工程数量</td>
<td>12</td>
</tr>
<tr>
<td>总计</td>
<td>48</td>
</tr>
</tbody>
</table>
</body>
</html>